Means for preventing singles in roving-machines, &amp;c.



Nu. 68mm. Patented Aug. 27, mm.

- T. BENTLEY.

MEANS FOR PREVENTING SINGLES IN BOVING MACHINES, (Application filed June 6, 1901.) (N 0 Model.)

STATES PATET EEioE.

THOMAS BENTLEY, OE FRANKLIN, MASSACHUSETTS, ASSIGNOR OF ONF- HALF TO DRAPER COMPANY, OF PORTLAND, MAINE, AND IIOPEDALE,

MASSACHUSETTS.

MEANS IFOH PREVENTING SINGLES IN ROVlNG-MACHINES, 800.

SPECIFICATION forming part of Letters Patent No. 681,612, dated August 27, 1901.

Application filed June 6,1901. Serial No. 63,414. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS BENTLEY, a citizen of the United States, and a resident of Franklin, in the county of Norfolk and State of Massachusetts, have invented an Improvement in Means for Preventing Singles in Roving-Machines, &c., of which the following description, in connection with the accompany ing drawings, is a specification, like characters on the drawings representing like parts.

In certain machines for preparing fibrous materialsuch as slubbing, intermediate, and roving framesa plurality of slivers are led through suitable guides and united into one roving by suitable drawing-rolls, and if one sliver of a set breaks the roving will not be of the requisite thickness and singles, as technically termed, are formed. Means for preventing singles forms the subject-matter of United States Patent No. 426,903, granted to me April 29, 1890; but while such means is, in a measure, successful the structure is complicated and includes many different parts, and the slivers of a set are subjected to unequal strain, owing to the location and arrangement of the detectors. The leading feature in said patent comprises two levers or detectors pivotally mounted on a stud and each engaging and being normally sliver breaks the teeth of the lever or detec tor normally supported thereby will engage and effect breakage of the other sliver, due to the pull exerted by the drawing-rolls, and a single is prevented. My present invention has the same object in view; but I have greatly reduced the number of parts, and the construction has been correspondingly simplified, while at the same time I have so arranged the deteotors that the slivers normally maintaining them inoperative are subjected to equal strain.

Various novel features of my invention will be hereinafter described, and particularly pointed out in the following claims.

Figure 1 is an end elevation of a part of a slubbing, intermediate, or roving frame with one embodiment of :my invention applied thereto. Fig. 2 is an enlarged front elevation of the detecting means arranged for single-boss drawing-rolls, the detectors being shown in normal position. Fig. 3 is a top or plan view thereof. Fig. at is a view Similar to Fig. 3, but showing one of the detectors in abnormal position, it having been released by its sliver to engage and effect breakage of the other sliver, the other detector being shown as upturned to permit access to the guide-eyes. Fig. 5 is a transverse section 011 the line 0000, Fig. 2. Fig. 6 is a detail in elevation of a part of the guide-bar, showing the guide-eyes for the slivers. Fig. 7 is a front elevation of the detector devices arranged for double-boss drawing-rolls, and Fig. 8 is a top or plan view thereof.

In the portion of the frame illustrated in Fig. l the slivers are led from bobbins B in usual manner through guide-eyes g g in the usual guide bar or plate G, set on edge back of the said drawing-rolls D, which may be of usual or well-known construction in apparatus of this character, it being understood that the slivers b Fig. 1, pass from separate bobbins through the guide-eyes g 9, respectively,to the drawing-rolls. As is well known to those skilled in the art, if one sliver of a pair breaks and the breakage is not promptly detected and the damage repaired a single will be produced, which damages the character of the roving and of the yarn subsequently formed therefrom, and the novel features of my invention now to be described prevent a formation of singles in a novel and exceedingly simple manner.

Referring more particularly to Figs. 2 to 5, inclusive, I have shown a guide-bar 7t as secured to the plate G in front of the guideeyes g g by two like studs F, the structure of which is clearly shown in Fig. 5, each stud comprising a head f, an adjacent boss f, a circular fulcrum-seat f and a threaded shank f and by referring to the drawings it will be noted that these studs are oppositely setthat is, one Stud is extended from the back of the plate Gr forward and is screwed into the guide-bar h while the other stud is extended through the guide-bar rearwardly and is screwed into the plate G, so that the fulcrum-seats f are located in two parallel in such a manner as to rock in parallel planes 1 transverse to the line of travel of the slivers. The detectors D are arranged in pairs, one

pair for each head or section of the drawingrolls, if the latter are single boss-rolls, and the detectors of a pair are exactly alike, but oppositely arranged upon the seats f as has been described. Each detector has an upturned head d, which normally is substantially above its fulcrum, and a laterally-extended branch (1, terminating at its inner end in a depending foot d which is adapted to rest upon one of the slivers, and in the arrangement herein shown the foot rests upon that sliver most remote from the fulcrum of the detector engaging the sliver between the plate G and guide-bar h The extension cl is cut away or made arch-like on its under side to extend above and over the other sliveras, for instance, the sliver h, viewing Fig. 2. The left-hand detector is normally supported in the position shown by the sliver b and said extension is provided with a series of prongs, teeth, or tines d which are normally held above the other sliver, but out of engagement therewith. The fulcra of the two detectors are located outside the pair of slivers, and the distance from the fulcrum of one detector to the sliver normally sup porting it is equal to the distance from the fulcrum of the other detector and its supporting-sliver, so that both slivers of a pair will be subject to precisely the same strain, inasmuch asthe detectors are alike. The leverage is quite long, as will be noted, so that, taken in connection with the head cl, which forms to a certain extent a counterbalance for the detector, a sliver is subjected to very little strain, so far as the weight of the detector is concerned. The inner free ends of the detectors extend past each other in the arrangement herein shown, so that the foot of one detector rests upon its own cooperating sliver, and the tooth or engaging portion straddles the other sliver.

In Fig. 4 the left-hand detector is shown in the position it would assume due to breakage of the sliver b the dropping of the detector into the position shown causing the teeth d to engage the othersliver--as,forinstance, b,

in the guide-eyes the detectors will be swung down into operative position, as shown in Fig. 2.

By making the studs F as has been described it will be manifest that they are interchangeable, and thus the number of sepa rate parts is reduced and the structure siniplified; and it will also be seen that the detecting means for a pair of slivers comprises simply two detectors, two studs, and the guide-bar h the latter being notched, as at h h, for the two slivers, said notches being arranged substantially opposite the eyes 9 g of the guide-plate G.

A stop-pin 10, fixed in the guide-plate G, is adapted to limit the swinging movement of a detector, the said pin engaging a shoulder d when a detector is released, and when a detector is upturned, as at the right, Fig. 4, the pin engages the back part of the head d.

In adapting my present invention to donble boss-rollers the detectors will not necessarily in any way differ from those hereinbefore described, and they operate in precisely the same manner and are arranged in pairs, but, as shown in Figs. 7 and 8, a different guide-bar will be used and three supportingstuds, the outside studs being precisely the same as shown in Fig. 5, but the center stud will be slightly modified in its construction.

Referring to Figs. '7 and S, the outside studs are shown as extended forward through the guide-plate G and having their threaded shanks f screwed into the guide-bar m so that the fulcrum-seats for the extreme right and left hand detectors DD willbe adjacent the inner face of said guide-bar, the said detectors moving transversely in substantially the same vertical plane. Through tlie center of the guide-bar a third stud is extended, but rearwardly, into the plate G,the threaded shank f of the said screw engaging the latter while its head f rests against the outer face of the guide-bar. The fulcrum-seat f of the center stud is made wide enough to support side by side the two inside, but oppositely-turned, detectors D D, the former cooperating with a sliver of the right-hand pair while the latter cooperates with a sliver of the left-hand pair, viewing Figs. 7 and 8. The guide-bar m is provided with notches or guide portions m m 172 072 and the slivers s s of one pair are directed through the guide portions m m while the slivers s s are directed through the other two guide portions m m respectively.

Whether the drawing-rolls are double or single boss it will be, of course, understood that the detecting devices for preventing singles will be duplicated for every set of slivers, and by the term set I mean the plurality of slivers which go to make up a roving.

The extreme simplicity of the present embodiment of my invention is one of the principal features thereof, and another feature of particular importance is the equalization of strain to which the several slivers of a set are subjected, as it will be manifest that with each sliver of a set subjected to the same strain there is no tendency to attenuate or weaken one sliver because it is subjected to more strain than its fellow. This has been a very practical objection in devices of this general character heretofore, and it is impossible to produce thoroughly uniform roving if the slivers constituting the roving are subjected to unequal strain during their manipulation.

My invention is not restricted to the precise construction and arrangement herein shown, as the same may be modified or re arranged in various particulars by those skilled in the art without departing from the spirit and scope of my invention.

The guide-plate G corresponds to the usual guide-plate in slubbing intermediate or roving frames, and it will be understood that the detecting devices are mounted directly upon such plate, thus obviating the addition of more or less complicated mechanism to the frame.

The guide-bar is herein shown as located very near the plate G, so that the sliver is supported at two points close together and the free end of the detector rests on the sliver between them, so that there is practically no opportunity for the sliver to sag, and the slight strain exerted on the sliver by the de-.

tector is equally and readily distributed to the two fixed points of the support.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In mechanism forpreventingsingles, the combination with means to move and to guide the slivers, of two detectors pivotally supported at their outer ends to move transversely to the slivers and having their inner ends extended past each other, each detector normally engaging and being maintained inoperative by one of the slivers and having a device to engage and effect breakage of the other sliver when released by breakage of its own sliver.

2. In mechanism for preventing singles,the combination with means to move and to guide the slivers, of two detectors pivotally supported at their outer ends to move transversely to the slivers and having their inner ends extended past each other, each detector normally engaging and being maintained inoperative by the sliver farthest from its fulcrum aud having a toothed portion to engage and effect breakage of the other sliver when the detector is released by breakage of its own fulcrum.

3. In mechanism for preventing singles,the combination with means to move and to guide the slivers, of two like detectors pivotally supported at their outer ends to move transversely to the slivers and having their inner ends extended above the slivers and past each other, each detector having a depending foot to normally rest on one sliver, and a toothed portion above the other sliver, release of a detector by breakage of its sliver effecting engagement of the toothed portion of said detector with the other sliver to efiect breakage thereof.

4. In mechanism for preventing singles, means to move and to guide the slivers, and

a plurality of like detectors having independent, fixed fulcra and movable transversely to the slivers, the free end of each detector engaging one sliver and being normally maintained inoperative thereby and having a device to engage and effect breakage of the other sliver when released by breakage of its own sliver, the fulcra of said detectors being equidistant from the slivers normally supporting them, whereby the slivers are sub jected to equal strain.

5. In apparatus of the class described, an upright plate having guide eyes through which the slivers are drawn, an auxiliary, notched guide-bar, two like fulcrum-studs to secure the said guide-bar to the plate in front of the guide-eyes, each stud having a head, a boss adjacent thereto, a detector-seat, and a threaded shank, and oppositely set to engage the plate and guide -bar respectively with their threaded shanks outside the sliverpaths, two like detectors each pivotally mounted on the seat of one of the studs, to rock thereon in parallel planes transverse to the slivers, the inner, free ends of the detectors passing each other and being normally supported by the sliver remote from its fulcrum, each detector having teeth to engage and effect breakage of the other sliver when released by breakage of its own sliver.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS BENTLEY.

WVitnesses:

JOHN C. EDwARns, AUGUSTA ELLA DEAN. 

